US12861A - peters - Google Patents

Description

F. P. HART;

Markingv Gage.

510.12361, Patented Mag/15,1855.

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ors P. HART, of yfolf Chester and ve` invented .Certain nents in Gages for, bei` and. Other Ma` declare that f ,the

" exact"` descrip- ,being had to the y acco panylng cli`"av`vings,` forming part of thisspeciiication, in which`` Y i Figure l,`is`a` u `nal outside view of,y gageconstruc dingto my inven` tion. FigiQ, is alongitudinal section of the Esame Fig. 3, a longitudinal outside View y showing a different sidetof'Fignl. l

Similar lettersof reference indicate' correspending parts in theseveral figures. r

`Thisjinvention"consists `firstly in a contriv-` `ance" for gaging in an oblique direction relay tively to ,a given edge solas to mark off strips d of tapering form. Secondly, in acertain aryrangement of one .of two scribers employed `:for cuttingumortises whereby it may berendered `inoperativewhenthe gage is used for Jscribinga single line. r Thirdly in a sliding f guide piece to be broughtinto use for gaging ourves,.cir1cles` and irregular forms.` l

" `Toenable others skilled in the art to make anduse my invention Iwill proceed to de-l "scribe its constructioniand operation.

"A, is the stock of` the gage' whichhas a female screw in each endto receiveand lit a i zffine `threaded y male screw which extends nearly `along the whole length'of the shaft "B, and is also furnished with a binding -screw C, by which tosecure it at any point on the shaft. `The shaft has a pin a, turned down at one end to receive one of a number y of wheels 19,6, whichhave sharp pointed teeth, on their` peripheries.` These wheels areconined tothepin `by a screw `on the pin and two nuts `c, lc", and may be either r allowed to run loosely on the pin o-r be `clamped tightup to a shoulder on `the shaft atthe back `of the pin, according tothe pur- `pose forwhichhthe gage is to be used. In gaging obliquely for articles of tapering 1` form, the Wheel Z9, which is placed on the pin is `clamped by the nuts c, cf, tight'upto the shoulder i, on the shaft,yand the binding `screw C, inthe stock is loosened toallow the screwto turn n thestock; `The shaft isadjusted in `the stock by a scale d, (seeFigrl) of `inches or other equal parts, `which com-v th at Geer. ron SLITTINQLUMBEB.

`specie non" f Tieners raient No."12,861,` dated May 15,*1'855.

orderktobring the teeth of the "wheel b, at a distance from the face e, f the stock, corresponding with lthe width of one end of the strip or i article to be'gaged.` The "gage," is then `run along the stuff in the same way as a;coininfiii` gage, `and 'the wheel receiving rotary motion "throughthe bite of its teeth'f `onthe stuff as it runs along it, turns the screw, and, according to the direction of its revolution, either increases or diminishes the distance between fthewheel andthe `face ofthe y, stock thus" running and scribi'ng obliquely to the fjguiding edge. size of the Wheel b, the taper may be greater or less, according as the wheel is smaller or larger. In gaging parallel the wheel b, is`

` By changing f `the left free bythe nuts c, c, to turn easily and the stock and shaftj are secured together by the binding screw C. y

For the purpose of gaging mortisesthe gage has `a` slider D, fitted to a groove in Vits shaftsaid slider carrying-a scriber f, which is hinged to itso as togbe capable when not required for use of being folded down to be received within the groove in the shaft as shown in red outline inF ig. 1. Whenjthrown outward thescriberf, is kept at a right angle to the shaft by a square shoulder at y, seeFig. 2, and when cutting, is kept up to that position by reason of its edge being beveled on the oppositeside to the shoulder.` The outer face of the slider D, has a scale of inches or equal parts like that on the scale d, on the shaft ofthe gage, and it is adjusted by means of a screw E, passing through a loop at its end and working in a female screw in the opposite end of the shaftto where the wheels b, are fitted. For gaging both sides of a mortise, the sca-le d, on the shaft and the scale on the slider D,

enable the scriber f, to be adjusted by the screw E, with accuracy, at a distance from the edge of the wheel equal to,y the required width of themortise, andthe stock is adjusted on the shaft to bring its face to a disrtance from the edge of the scriber equal to the required distance from the edge of the stutf. The toothed edge of the wheel scribes `oneside and the scriber f, the other side of mences at the shoulder ,of the shaftk and in metal fitted in a slot made in the stock parallel with the shaft, and adjustable length-l irregular edge, consisting of a flat piece of Wise by a screwl j, at the back. The front end is of rounded orm as shown in Fig. 1. In gagi'ng straight Work the guide piece F, is all drawn into the stock, by means of the screw j, and the face of the stock serves as the guide; but for gaging circular, curved or irregular Work the guide piece is screwed out beyond the face and its rounded end forms the bearing, and allows the gage to follow the sinuosities of any curved or irregular edge. This instrument will be useful for 'saddlers or other Workers in leather as Well as Workers in Wood. As a gage for cutting leather, a sharp edge rotary cutter may be substituted for the toothed Wheel b. What I claim as my invention and desire to secure by Letters Patent is.

l. The employment of'a rotary cutter secured to the shaft of the gage, when the said shaft screws into the stock and is made capable of turning freely therein as described, for the purpose of gaging taper Work.

2. Attaching the adjustable seriber f, by a hinge joint constructed With a shoulder g, substantially as described, to the slider which carries it, so that it may be rigid when extended for mortsing but may fold into the recess in Which the said slider Works When the gage is used for other purposes than mortising.

3. The employment of a round faced guide piece F, fitted to slide Within the stock of the gage, so as to be Withdrawn into it when the gage is to be used for straight Work, but to be protruded from it when required to serve as a guide for gaging Curved circular or irregular Work, as herein fully set forth.

FRANCIS P. HART.

Witnesses:

PETER HART, HABLAN C. RICHARDSON.

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